121616160066 has 12 divisors (see below), whose sum is σ = 263501680182. Its totient is φ = 40538720016.

The previous prime is 121616160053. The next prime is 121616160079. The reversal of 121616160066 is 660061616121.

It is a happy number.

121616160066 is a `hidden beast` number, since 1 + 21 + 616 + 16 + 0 + 0 + 6 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (121616160053) and next prime (121616160079).

It can be written as a sum of positive squares in only one way, i.e., 108589361841 + 13026798225 = 329529^2 + 114135^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121616160066.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3378226651 + ... + 3378226686.

Almost surely, 2^121616160066 is an apocalyptic number.

121616160066 is an abundant number, since it is smaller than the sum of its proper divisors (141885520116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121616160066 is a wasteful number, since it uses less digits than its factorization.

121616160066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6756453345 (or 6756453342 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

Adding to 121616160066 its reverse (660061616121), we get a palindrome (781677776187).

The spelling of 121616160066 in words is "one hundred twenty-one billion, six hundred sixteen million, one hundred sixty thousand, sixty-six".